Remove an unused script. [skip ci]

There is a different solution in place, which is a superset of this.

diff --git a/buildem b/buildem
deleted file mode 100755 (executable)
index 2408953..0000000
--- a/buildem
+++ /dev/null
@@ -1,28 +0,0 @@
-#!/bin/sh
-
-# this script builds libpcap and tcpdump using the matrix of compilers and architectures
-# that travis also buildsd.
-
-if [ -f Makefile.in ]; then cd ..; fi
-here=`pwd`
-mkdir -p builds
-cd builds
-
-export CFLAGS='-fno-omit-frame-pointer -fsanitize=address -fno-optimize-sibling-calls -fPIC -Wextra -g3 -ggdb3 -O0 -Werror'
-for arch in i386 x86_64
-do
-        case $arch in
-        i386) CFLAGS="-m32 $CFLAGS"; export LDFLAGS="-m32"; export CXXFLAGS=-m32; target="i686-pc-linux-gnu" ;;
-        esac
-        (
-        for compiler in clang-6.0 gcc
-        do
-                mkdir -p $arch/$compiler
-                set -x
-                (cd $arch/$compiler && mkdir -p libpcap tcpdump &&
-                  (cd libpcap && CC=$compiler $here/libpcap/configure --target=$target && make ) &&
-                  (cd tcpdump && CC=$compiler $here/tcpdump/configure --target=$target && make && make check))
-        done
-        )
-done
-